坝肩顺层岩边坡开挖支护方案数值模拟研究

Numerical simulation study on excavation and support scheme for bedding rock slope of dam abutment

顺层岩质边坡稳定性问题一直是困扰工程建设的一大难题,且目前关于边坡开挖支护安全评价往往仅针对施工完毕工况下进行,较少关注施工过程中的安全稳定性。因此在双龙水电站大坝右坝肩顺层岩边坡开挖支过程中,将边坡自上而下分为八级边坡依次采取不同措施进行支护,并用数值模拟方法分析边坡安全稳定性,结果显示:在边坡施工中坡体一直处于稳定状态,说明开挖支护施工方案是合理的,可以在具体施工中采用。建议应该加强开挖部位的监测和加固,保证工程施工的顺利进行。

The stability of bedding rock slope has always been a difficult problem in engineering construction.At present,the safety evaluation of slope excavation and support is usually carried out only under the completed condition and less attention is paid to the safety and stability during the construction process.Taking the bedding rock slope excavation of the right abutment of Shuanglong hydropower station as an example,this paper evaluates the excavation and support scheme by using the numerical simulation method.The results show that the slope is in a stable state during the construction,which indicates that the excavation and support construction scheme is reasonable and can be used in the specific construction.It is suggested that the monitoring and reinforcement of the excavation site should be strengthened to ensure the smooth construction of the project.